This is the unreleased Atari 2600 version of Coleco's Tarzan video game, developed by James Wickstead Design Associates and designed by Lawrence Schick. This particular copy came from a former Coleco employee, who sold it to collector AtariSpot. A 12 kilobyte game, this upload includes both the original ROM using a unique bankswitching scheme, as well as a conversion that uses the more common F6 bankswitching scheme, allowing it to readily run on emulators or flash carts.
This upload is associated with the Video Game History Foundation. Special thanks to AtariSpot for getting the game successfully dumped and making it available.